#include <header.h>

int main(){

    /*
    char buf[200] = {0};
    sprintf(buf, "%s%s", "nihao","hello");
    printf("buf: %s \n", buf);
    */


    FILE *file = fopen("1.txt", "r+");

    fprintf(file, "%s%s", "nihao", "hello");


    fclose(file);
    return 0;
}

